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What is difference between nominal mix and design mix?
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Answer Posted / v.purushotham
Nominal Mix:
 Fixed ratio of aggregate-sand-cement.
 Mix to be prepared on volume basis which may leads
under or over- rich mix.
 Not consideration of local available materials.
 Compressive strength of mix was calculated in
laboratory.
 These mixes can be used not more than rich mix
ratio of M20.
 It gives under demanding performance.
Design Mix:
 The Mix designed as available materials locally.
 Cost effective.
 Minimize the material and maximize the strength,
 These mixes are designed for cast in situ.
 These mixes are give high strength and high
performance
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